Covering for boilers



(No Modell) 2 sheetssheet 1 W. A. SCOTT, J1". COVBRING POR BOILERS.

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Patented May 1, 1894.

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W.I A, SCOTT, Jr.- GOVBRING FOR BOILERS. No. 519,137. Y- l Patented May1,1894.

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@ag/f lli NITED STATES PATENT OFFICE.

s WILLIAM A. SCOTT, JR., PITTSBURG, PENNSYLVANIA.

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SPECIFICATION forming part of Letters Patent No. 519,137, dated May 1,1894.. p

Application led November 1, 1893. Serial No. 489,726. `(ITo model.)l i

To @ZZ whom it may concern.-

`Be it known that I, WILLIAM A. SCOTT, J r., a citizen of the UnitedStates, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered certain `new and usefulImprovements in Coverings for Boilers, of which improvements thefollowing is a specification.

The invention described herein relates to certain improvements innon-conducting coverings for boilers, and has for its object aconstruction of .covering or protecting tile whereby they form whenapplied to the boiler, a continuous cover for the body of the boiler,and whereby they may b e irmly secured together and to suitable supportsforming parts of the structure ofwwhich the boiler, itself,

. forms a part.

In general terms the invention consists in the construction andcombination, substantially as hereinafter more fully described andclaimed. l

In the accompanying drawings forming a part of this specification,Figure l is a view in side elevation of a locomotive having my improvedboiler covering applied thereto, the outlines of the locomotive beingshown in dotted lines. Fig. 2 is a top plan view ofthe same. Figs. 3 and4 are transverse sections of the boiler, the planes of sections `beingindicated by the lines 00,00, and y, y, respectively. Fig. 5 is a viewin side elevation, on an enlarged scale, of a portion of the boiler.Fig. 6 is a sectional View on an enlarged scale, the plane of sectionbeing indicated by the line z, e', Fig. 3. Fig. 7 is a sectional detailview, on an enlarged scale, showing the manner of connecting adjacentends of the covering blocks or tiles. Fig. 8 is a top plan view of aportion of the boiler a portion of the covering being removed so as toshow a r portion-of the harness employed for holding the coveringblocksA in position. Fig 9 is a perspective view of one of the lockingstrips. Figs. l0 and l1 are perspective views of two of the coveringtiles. n l

"In the practice of my invention the tiles 1 and 2, which are formed'bythoroughly burning or chunking re clay, then molding it to a shape toconform to or approximately to the shell of the boiler and againburning, are preferably made in pairs as shown in Figs.

10 and 1l, one member of the pair being formed with a lip 4. extendingalong at least three sides of tile adjacent to its inner face, as shownin Fig. 10, and the other member 2 being provided with a similar lip 5,adjacent to its outer face, as shown in Figs. 6 and 11.

In applying these tiles or blocks to loco motive boilers, it ispreferred to form the tiles of such length as to extend about onequarter of the way around the boiler shell,

and to form one end of each tile with an an gular portion` 6, as shownin Figs. 10 and 11, whereby it may be secured to a portion of the boilerstructure as, for example, the running board of a locomotive. Each ofthe tiles or blocks is 4provided on its inner face with projections orribs 7, near their ends for holding the tiles a short distance away fromthe shell of the boiler and the recesses formed by these projections arefilled with asbestus, mineral wool, or other fibrous non-conductor indestructible by heat, and which will serve as a cushion `for the tile,as shown in Figs. 3, 4, 6 and 7. p

. In applying these tiles or `blocks to a locomotive boiler, a harnessconsisting of longitudinal metal strips 8 and transverse tie strips 9are laid in position on the boiler, the` longitudinal and transversestrips being held together by bolts 10, which are adapted to passthrough suitable holes in `the tiles. As

shown in Fig. 8, the longitudinal strips 8 are suitably bent so as topass around the steam chest, sand box or other projection on the shellof the boiler. Two pairs of longitudinal strips, one for the upper andthe other for the lower side of the boiler, are employed, and the `tiestrips 9 connect the members of each pair, except where the longitudinalstrips pass around a projection on the boiler. At such points the tiestrips extend only to the basel of such projections. Figs. 3, 4, 7` and9, the tie strips are so bent as 'to form lugs 1l which project inbehind the ribs 7, ontthe tiles or blocks and thereby holding the sainein position. After the harness has been placed in position as described,the tiles having the asbestus packing in its recesses, are placed inposition, the angular` portions 6 of the tiles resting against therunning board 12, andthe opposite ends of the tiles abutting againsteach other at the up As shown in IOO per and lower sides of the boilerwith their lips 4 and 5 overlapping as shown in Figs. 3, 4 and 7. Itwill be understood that the ends of the tiles covering portions of theboiler in 5 line with the steam chest or other projection l thereon aresuitably shaped to lit closely around the base of such projection. Thetiles are secured to the running board or other projection by bolts 13passing through the run- Io ning board and the angular portions 6 of thetiles as shown in Fig. 4, and by the bolts IO of the harness, passingupthrough holes in the tiles. It is preferred to enamel the outer surfacesof the tiles so as to render them im- 15 pervious to moisture andfacilitate their cleaning. j

I claim herein as my invention- 1. In a covering for boilers, thecombination of a harness formed of longitudinal and zo transverse metalstrips resting upon the boiler and a series of lire clay tiles securedto the harness whereby the tiles are held upon the boiler, substantiallyas set forth.

2. In a covering for boilers, the combina- 25 tion of boards or supportsrunning longitudinal of the boiler and a series of fire clay tilesadapted to fit around the boiler and provided With angular portionsadapted to be secured to the boards or supports, substantially as setforth.

3. A fire clay tile for covering boilers having its inner face shaped toconform to or approximatelyfto the shell to be covered, and provided atone end with a portion formed at an angle to the body of the tile andperfo- 3 5 rated for the passage of bolts, whereby the. tile may besecured to a suitable support arranged longitudinal of the boiler,substantially as set forth.

4. In a covering for boilers, the combination of a series of tilesfitting around the boiler and provided on their inner sides with ribsand tie strips provided with lugs engaging said ribs, thereby preventinga separation of the ends of adjacent tiles, substantially as 45 setforth.

In testimony whereof I have hereunto set my hand.

WILLIAM A. SCOTT, JR.

